Question into the account of the comment
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blackbird71 last edited by
A colon can mean a number of things, depending on what the author was trying to do when he wrote it.
In English grammar, a colon can be used to set off or focus on the words that follow. As an example: this phrase has been set off by the colon ahead of it. Also as @leocg notes, the colon may be an attempt to create an emoticon which in many forums will display as a small inline image symbol in a text string. For example: a colon combined with a parenthesis with no space between will produces a or symbol here. In certain coding languages, a colon may act as a 'control' symbol to cause a certain action or function as a certain kind of demarking or definition symbol.
Do you have a specific example of how the colon is being used?